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The impact on drivers themselves is the focus of a new campaign against speeding drivers supported by Kent Police.
The new £3.2million Think! campaign is being launched by Road Safety Minister Jim Fitzpatrick on Monday.
The campaign will focus on the consequences of speeding on the drivers as well as victims. A new television advert will show a driver haunted by images of the child he has killed - seeing his body in the bathroom mirror, through the window of a bus and when in the park with his son.
• Watch the new 'Kill your speed, or live with it' TV advert to be aired from today at the top of this page.
Jim Fitzpatrick said: "The last Think! campaign on speeding highlighted if you hit a child at 30mph there's an 80 per cent chance they will live but if you hit them at 40mph there's an 80 per cent chance they will die.
"We now want motorists to consider the consequences of speeding for them. What is life like for the driver who kills because they are in a rush to get home? How does that split second decision affect the rest of their life? I hope this powerful new campaign will get drivers in Kent to kill their speed before it's too late."
In the south east, there were 265 people killed or seriously injured on 30mph roads by speeding drivers in 2007.
A Kent Police spokesman said: "Kent Police takes a zero tolerance approach to speeding and other road traffic offences. We use a combination of enforcement and education, 24 hours a day, seven days a week, to drive home the message that we expect people to obey the law.
"The consequences of dangerous, irresponsible and anti-social behaviour on the roads can be horrendous."
• What do you think of the new advert?Watch it at the top of this page and send us your views via the 'Make a comment' tab below.